Periodic and Perpetual Systems$$Calculating Ending Inventory and Cost of Sales Using Average Cost $($Moving Average$),$ FIFO, and LIFO

Undew Inc.$$s inventory records showed the following data for an item it sells regularly.

Date Units Unit Cost

Jan. $1$ Inventory $($beg$.)3,200$ $$10\mathrm{.}00$

Jan. $3$ Purchases $28,800$ $$10\mathrm{.}40$

Jan. $7$ Sales $($at $$26$ per unit$)11,200$

Jan. $20$ Purchases $9,600$ $$11\mathrm{.}00$

Jan. $22$ Sales $($at $$27$ per unit$)25,600$

Jan. $30$ Purchases $4,800$ $$12\mathrm{.}00$

a$.$ Assuming that Undew maintains a periodic inventory system, compute ending inventory and cost of goods sold for the month ending January $31$ using $(1)$ average cost, $(2)$ FIFO, and $(3)$ LIFO.

b$.$ Assuming that Undew maintains a perpetual inventory system, compute ending inventory and cost of goods sold for the month ending January $31$ using $(1)$ moving average, $(2)$ FIFO, and $(3)$ LIFO.